✨ Error Trigger node documentation

docs/nodes/nodes-library/core-nodes/ErrorTrigger/README.md

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+permalink: /nodes/n8n-nodes-base.errorTrigger
+---
+
+# Error Trigger
+
+Error Trigger node triggers the workflow when another workflow has an error. As opposed to other workflows with a trigger node, you won’t have to activate the workflow when using the Error Trigger node. Once a workflow fails, this node automagically gets details about the failed workflow and the error workflow gets triggered.
+
+## Example Usage
+
+This workflow allows you to receive updates when another workflow fails using the Error Trigger node. You can also find the [workflow](https://n8n.io/workflows/662) on n8n.io. This example usage workflow would use the following node.
+- [Error Trigger]()
+
+The final workflow should look like the following image.
+
+![A workflow with the Error Trigger node](./workflow.png)
+
+### 1. Error Trigger node
+
+1. Click on ***Execute Node*** to run the node.
+
+## Further Reading
+
+- [Creating Error Workflows in n8n 🌪](https://medium.com/n8n-io/creating-error-workflows-in-n8n-6e03c9ecbc0f)